How long till harvest and how to make buds bigger

There are still about 3 weeks left before harvest, it also depends on the dominance of the variety, if it is a sativa dominant variety then up to 4 weeks, if indica then about 3 weeks before harvest, to improve harvest I advise adding additives to strengthen the roots both at the beginning of the journey and during flowering, all the strength of the plant comes from the roots. And if possible, apply fertilizers with phosphorus.Personally, I add mycorrhiza at the very beginning for better root system growth and absorption of fertilizers from organic or minerals. If the soil is quite nutritious, you can do without mineral fertilizers, purely organic soil and mycorrhiza, since after mineral fertilizers it is necessary to wash to remove excess fertilizers from the roots and leaves to improve the taste.